why post stats without mentioning QOC?
Because it doesn't matter.
http://nhlnumbers.com/2012/7/23/the-importance-of-quality-of-competition
While competition certainly does play a big factor in determining how a player will do in any given shift, with these competition metrics we see nobody with usage extreme enough to require a major correction factor.
Zone starts don't have much of an affect, either. QOT is the single biggest driver of counting and possession stats by a country mile.